Question

A 5,400 W motor is used to do work. If the motor is used for 640 s, about how much work could it do?

8.4 J
4,800 J
6,000 J
3,500,000 J

Answer 1

To find the work done by the motor, we can use the formula:

\[ \text{Work} = \text{Power} \times \text{Time} \]

Where:
- Power is given in watts (W),
- Time is given in seconds (s),
- Work will be in joules (J).

Given:
- Power = 5,400 W
- Time = 640 s

Now, calculating the work:

\[
\text{Work} = 5,400 \, \text{W} \times 640 \, \text{s}
\]

\[
\text{Work} = 3,456,000 \, \text{J}
\]

The closest option to our calculated value is **3,500,000 J**.

Therefore, the answer is **3,500,000 J**.